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Fish, Distillery and Fermentation by-Products Studied in Drylot Rations of Weanling Pigs¹

University of Illinois^,3

Abstract

Five drylot tests involving 286 weanling pigs fed to approximately 100 pounds live weight were conducted to study the value of condensed fish solubles, semi-solid Redfish product, semi-solid fish product from Cod and Haddock, Menhaden fish meal, dehydrated alfalfa meal, dried fermentation solubles, and combinations of certain of these products. In three of these tests, the weanling pigs used had been raised in drylot while those used in two tests had been produced by sows on pasture. All rations were equated for crude protein.

The responses of weanling pigs to vitamin supplements were greater and more consistent when they had been raised since birth in drylot rather than on pasture. This indicates that the pigs on pasture until weaned stored vitamins in their body tissues which enabled them to respond satisfactorily on a basal ration that was deficient for pigs that had been in drylot until weaned.

A 20% protein ration composed of ground yellow corn, 6% meat scraps, soybean meal, minerals and fortified A and D oil was inadequate for weanling pigs that had been in drylot since birth.

¹ These investigations were supported by the donation of funds and products to the University of Illinois by Central Soya Co., Inc., Decatur, Indiana; Dehydrating Process Co., Boston, Mass.; Philip R. Park, Inc., San Pedro, Calif.; Hiram Walker and Sons, Inc., Peoria, Illinois; and Commercial Solvents Corporation, Terre Haute, Indiana.

² Acknowledgment is gratefully made for the assistance of R. F. Van Poucke, formerly Assistant in Animal Science, in the conduct of Experiment 2, and R. H. McDade, Chief Swine Herdsman, and his associates.

³ Animal Science Department, Urbana, Illinois.